GB2058164A

GB2058164A - Producing sample warps

Info

Publication number: GB2058164A
Application number: GB8029765A
Authority: GB
Original assignee: Hergeth KG Maschinenfabrik und Apparatebau
Current assignee: Hergeth KG Maschinenfabrik und Apparatebau
Priority date: 1979-09-26
Filing date: 1980-09-15
Publication date: 1981-04-08
Also published as: US4831695A; IT8024902A0; DE2938902A1; DE2938902C2; CH650286A5; GB2058164B; JPS6211098B2; JPS56140129A; US4683625A; IT1132746B

Description

1 GB 2 058 164 A 1

SPECIFICATION

Apparatus for the Production of Short Warps, Especially for Cloth Designs in Multicolour Weaving The invention relates to apparatus for the 70 production of short warps, especially for cloth designs in multicolour weaving, in which the differenfly-coloured yarns are wound one after another and the yarns pass through yarn-crossing devices on being wound, in the course of which the yarns received as a continuous group of yarns can be severed.

Such machines for the production of short warps serve the purpose of enabling a short yarn to be warped with but one bobbin per colour, whereby there is a considerably saving in working time and material. The production of groups of yarns with the yarn colours changing over predetermined widths of the whole group enables the fabrication of cloth designs to be carried out rationally, so that the production of samples is facilitated.

In the case of one known kind of short-warp warping frames the yarn guide device is movable along the peripheral contour of the winding 90 device at right angles to the direction of movement of the winding surface, whereas the carrier is stationary relative to the winding device.

Moreover, the winding device is built up from at least two redirecting rollers which are arranged in spaced-apart relationship and the relative spacing apart of which is adjustable. The winding device is, moreover, provided with feed members movable in the direction of the longitudinal axis, whereby the transfer of the feed bands can be 100 effected by means of a screw spindle. On winding the yarn about the winding device, each yarn on being laid can at the same time pass through a leasing or crossing device, so that the finished warp can automatically obtain a lease or crossing 105 both at the beginning and the end.

In the case of another machine for producing warps there is used as warping frame a winding former which is in the form of a drum with a conically-ascending initial portion. The yarn guide for the assembly of yarns to be introduced is arranged displaceable along the drum. Moreover, there are arranged distributed over the periphery of the drum flexible metallic ribbons which are operative for the formation of leases or crossings and can be displaced along the drum axis. The drum with the cone portion enables the winding of the groups of yarns to be effected in length, whereby the winding can be continued without interruption from the start of the first length up to the end of the last length. The yarns are wound tightly after each finishing of a length up to the start of the next length. In doing so, there can be undertaken at least shortly before the finishing of a length a severance between the preceding windings and the winding or windings still to be produced. In the case of the known machine, the conical drum has a relatively large diameter of about 2 to 2.5 m. The drum is stationarily supported in the machine. This makes it necessary for the rewinding operation to be performed on the same machine. The warping operation is thereby interrupted for a relatively long time. Such a machine not only requires considerable floor space, but it is also of low productivity and time-consuming as regards production of short warps.

The object of the invention is to provide a machine for the production of short warps, especially for cloth designs in multi-colour weaving, which along with compactness is at the same time simple in construction and makes possible the carrying out of several operations of the warping by sections on the same machine, whereby the machine can be used fully for the manufacture of sectional warping. The apparatus of the kind mentioned in the beginning with a conical drum as winding former and with lease rods arranged to be displaceable along the drum axis is characterized in accordance with the invention in that a carriage having the yarn-supply device is equipped for taking up interchangeable carrier sections of which one has a heightadjustable slide bar for keeping the yarns separated and a cam for an overrun rod, and another carrier section is furnished with guide rollers for separate winding of differenJy coloured yarns. Moreover, yokes embracing the drum are connected with the carriage and the drum is provided removable from the driving shaft in the direction of its cylindrical end.

Through such a construction of the short warp production machine there is achieved a universal variety of uses for the warping plant. The production of sample warps of one piece length up to a plurality of piece lengths may be accomplished. A small number of delivery bobbins is sufficient. The possibility is afforded by the warping machine, moreover, that warping by sections may be effected in accordance with two different procedures, namely, on the one hand, in accordance with the lease or crossing method, and, on the other hand, in accordance with a colour- division method. Operations in accordance with the lease or crossing method is preferred when the number of yarns is less than the number of bobbins available. A group of yarns should conform to the actual repeat dimension. The individual yarns are drawn into the reed in conformity with the colour sequence and a double lease or crossing can be formed automatically at the end of a wound lap. In accordance with the colour-division method sample warps are produced, which have a variable colour sequence over the overall warp width. With them the individual yarns subdivided according to colour, are separately wound. The overall warp is composed with this of a specific number of individual assemblies of side-by-side yarns. At the same time, owing to the removability of the drum from the warping machine, it is rendered possible for the rewinding procedure to be conducted on a separate rewinding machine, whereby the beaming device may be combined in known 2 GB 2 058 164 A 2 manner with a sizing device. The warping drums 65 may be relatively short and have a relatively small diameter. By this means they can be easily manipulated in such a way that they can be placed in front of a beaming machine. The length of the warping drums is preferably so confined that a sample warp can be run by means of three warping drums on a sectional beam of usual length of about 2 m. The warping machine for short warps in accordance with the invention is distinguished furthermore by a compact construction with modest floor space requirement.

Preferably, the lease rods are provided over part of the periphery of the drum and the overrun rod at a clearance from the set of lease rods.

Moreover, the carriage below the drum may have a vertically-adjustable striker bar which extends over the range of the set of lease rods. In that way all lease rods can be adjusted simultaneously through the striker bar. The lease rods are preferably provided at their rearward ends with extensions in the form of cords. The cords may, moreover, be wound as bobbins which are arranged at the supporting device for the drum cone. In this way, the lease rod cords are accommodated with economy in space.

For the colour-division methods, two yokes form a pair of yokes in the case of which the two yokes are connected with each other at a predetermined spacing. The group of yarns is fed between the yokes of the pair of yokes to the drum. The group of yarns can be controlled as regards displacement thereof in the direction of the drum axis by shifting of the pair of yokes.

The carriage has different supplying devices depending on the nature of the carrier section. For the first carrier section, the supplying device may have feed rollers with a measuring roller, tiered lease rods for the coloured yarns, a reed for the shedding and a reed for the leasing. For the second carrier section, the carriage may receive, besides a reed and looping rollers, a guide member for the distribution of the coloured yarns in the direction of the drum axis.

In accordance with a further feature of the invention, a beaming machine for a sectional beam is associated with the warping machine for short warps, the beaming machine being provided with take-up devices for the warping drums. The shafts for mounting the warping drums are staggered in elevation and/or in lateral spacing.

What can be achieved by these means is that the last yam of the one warping drum with the first yarn of the adjacent warping drum, arranged close to said one warping drum, are added to the desired sample warp.

The invention is hereinafter explained with the aid of the exemplary embodiments represented in the drawings.

Fig. 1 shows a plan view of the apparatus in accordance with the invention for warping short warps by sections and for producing a sample warp with a specific warp width which amounts to a multiple of the winding width of the warping frame.

Fig. 2 is a schematic view on to the warping frame with warper's creel according to the Fig. 1 arrangement.

Fig. 3 represents schematically a side elevation of the warping frame and the rewinding machine in the direction of the arrow Ill in Fig. 1.

Fig. 4 shows schematically one specific embodiment of the arrangement of the lease rods and of the overrun rod at the cone drum mounting support.

Fig. 5 is a view according to the line V-V of Fig. 4.

Fig. 6 shows a schematic view on to the warping frame in the direction of the arrow VI of Fig. 1 with the warping device in accordance with the lease or crossing method, partly cut away and on a larger scale.

Figs. 7 and 8 illustrate, diagrammatically in end elevation on to the drum, two stages in the forming of a lease or crossing by means of a slide bar and a lease rod.

Figs. 9 and 10 represent diagrammatically in plan view the stages of Figs. 7 and 8.

Fig. 11 illustrates an end elevation on to the carriage with the device for warping by sections according to the colour division method in elevation, partly cut away following the arrow VI of Fig. 1.

Figs. 12 to 15 illustrate four operating stages of the double yoke in accordance with the invention in conjunction with the overrun rod at the transition from one winding section to the next following section.

Fig. 16 shows a control diagram for the movement of the yoke at the change from one section to the next following section.

The apparatus for the production of short warps, especially for cloth designs in multicolour weaving, and for forming a sample warp with customary warp width, has a warping frame 1 with a warper's creel 2 and a rewinding machine 3. There are supported on the creel 2 a number of cross bobbins 4 which are placed in front of a creel 5. The individual yarns are guided to the warping frame 1 via yarn guide members and yarn stop-motions (not shown).

The warping frame 1 has a machine frame 6, 7 with incorporated drive and gearbox 8. A cone drum 10 is arranged to be slipped on and locked to a driven shaft 9, the drum 10 having a cylindrical portion 11 and a cone portion 12 joined therewith. A carriage 13 formed in the manner of a frame is mounted on guideways 14 and 15 to be displaceable lengthwise of the axis of the drivable shaft 9, the feed being effected through a threaded spindle 16 with spindle lock 17. Built into a control board 18 are the electrical control devices for a programme control and all important measuring and indicating appliances.

The carriage 13, which overlaps the cone drum 10 as a frame portion, is provided with supporting lugs 20 and 21 to which different types of carrier sections can be interchangeably attached. The 1 1 3 GB 2 058 164 A 3 carrier section 22 has a slide bar 23 which is angular at the end and can be displaced axially parallel to the drum shaft 9. The slide bar 23 can also be adjusted in elevation by means of a lifting cylinder 24. A guide for the slide bar 23 is denoted 25. The carrier section 22 is, moreover, provided with a cam 26 which interacts with an axially displaceable overrun rod 27. The cam 26 is supported in the sleeve 28 to be vertically adjustable, for which purpose a pneumatic lifting cylinder 29 serves. At a plate 19 on the carriage 13 is arranged a supply device 30 which has looping rollers 31 and a measuring roller 32, tiered lease bars 33 for the coloured yarns, a slide bar 34 for the shedding with vertically adjustable yokes 35, a leasing reed 36 and a warping comb 37. This yarn supply device serves for the forming of leases or crossings for the groups of yarns. To this end, there are provided longitudinally- displaceable and vertically adjustable lease rods 38, 39, 40 which are supported on the mounting support 41 for the cone drum.

The conical portion of the drum 10 may be provided with a predetermined number of slots 42 through which the lease rods are passed, whereby the number of the lease rods may be different depending on the warping method. The 'carriage 13 is, moreover, provided below the cone drum with a vertically- adjustable striker bar 43, which in the present case can engage the lease rods 38 and 39 and, if occasion arises, further lease rods arranged between the lease rods 38 and 39. The striker bar 43 grips in behind the angular ends of the lease rods, so that, on traverse of the carriage 13, all lease rods situated 100 within range of the striker bar 43 can be displaced in the axial direction of the cone drum. The striker bar 43 is inserted in a carrier bracket 44 which is connected with a lifting cylinder 44a. The cam 26 is of such a length that it can at the same time engage both the overrun rod 27 and also the lease rod 40 mounted in the vicinity of the latter.

As is shown in Figs. 7 to 10, the group of yarns, situated at any given time at the top through the shed forming reed, is engaged by means of the slide bar 23 and thrust in the direction towards the cone 12 of the drum. Through a partial revolution of the drum, the lease rod 38 is positioned below the group of yarns 45, Fig. 9. The slide bar 23 is now withdrawn and the 115 group or yarns 45 is let down on to the lease rod 38, as shown in Fig. 10. With the next change of shed, the procedure is repeated with the next following lease rod 39. The same applies as regards the further lease rod 40. The leases or crossings are formed between the lease rods.

Two leases or crossings are produced by means of the three lease rods, 38, 39, 40.

As can be gathered from Figs. 4 and 5, the lease rods, of which the lease rod 40 is shown as 125 an example, are supported in a guide 47 which is formed from the clamping jaws 47a and 47b, the clamping jaws being held joined with one another through the setscrew 47c. The mounting support 48 for the clamping fastener has slotted guide 130 bars 48a which can be adjusted in the mounting 49 fixedly set against the mounting support 41 and can be clamped by means of the nut and bolt 49a. There is attached to each lease rod a cord 50a, b, c, the cords being led through a yarn eye 51 a, b, c to the associated bobbins 52 and kept in reserve on the latter. The set of bobbins 52 is situated on a shaft 53.

When the thickness of the winding to be produced on the cone drum is determined by the length of the group of yarns being fixed by means of the measuring roller, the respective lease rod is advanced by means of the cam 26 or 43 and the advance of the carriage 13, whereupon a definite number of windings results. In conformity with the predetermined thickness of the package on the cone drum, the guide 47 for the lease rod can be adjusted lengthwise at the mounting 49.

A carrier section 55, which is fixed to the holders 20, 21 of the carriage 13, serves for the colourdivision warping method (Figs. 11 to 15). The carrier section 55 had guide rollers 56 in conformity with the number of coloured yarns, the individual yarns, divided, according to colour, being separately taken up. In the capacity of supply means serves a reed 57 from which the yarns are led over a measuring roller 32a and a looping roller 58 to a distributing bar 60 through which the individual coloured yarns are kept differently apart axially of the guide rollers 56. The coloured yarns 62 are consequently wound separated from one another on the drum portion 11. Between each adjacent two of the coloured yarns is situated a lease rod 61 in order that the coloured yarns are kept separated from one another.

The carriage 13 is provided with a yoke 63 which consists of the two yoke portions 64 and 65 which are connected to one another at a fixed spacing apart by means of the spacer 66. The yoke portions 64, 65 are supported on tie rods 69a which can be adjusted, by way of couplers 69, through a pneumatically-driven cylinder 69c. Between the two yoke portions 64 and 65 extends the group of yarns 67 in the case of which the differently coloured yarns are arranged side by side at intervals of a few windings, for example three to six windings. The yoke 63 carries out by means of the carriage 13 different stroke movements lengthwise of the drum axis, as represented diagrammatically in Fig. 16. Fig. 12 shows the first or original position at the point 68, whereat the yoke portion 64 is located above the reach of the lease rod 61. The first stroke 1 is attained according to Fig. 13 and during which the yoke 63 with both yoke portions 64 and 65 is displaced in the direction towards the cone portion of the drum and the yoke portion 65 is also situated in the reach of the lease rod 61. With this the group of yarns 67 is applied to the yoke portion 65 at the inlet side. The drum now carries out a few revolutions, so-called reserve windings are formed, so that the group of yarns 67 settles on top of the lease rod 61. Thereafter the yoke 63 is shifted through a further stroke 4 GB 2 058 164 A 4 movement 11 in the direction towards the cone end of the drum, so that now the whole group of yarns settles on the yoke portion 65 and is doing so is also brought on top of the overrun rod 27. The third stroke movement Ill now takes place by way of a return stroke in the course of which the yoke 63 is displaced beyond the first position. Because of this, the group of yarns 67 at the cone of the formed package can slip down a short way with the help of the yoke portion 64. With this manner of displacement Ill, the lease rods 61 and the overrun rod 27 are shifted at the same time by means of the striker bar 43. The yoke 63 thereupon returns back into the first or starting position of Fig. 12 in conformity with stroke movement IV. A new section can then be wound. The clearance between the yoke portions 64 and 65 depends on the selected band width of the group of yarns 67.

The working operation with the warping plant takes place in the following manner. The yarns are led in the desired width over the looping rollers 31, 58 and, if occasion arises, the measuring roller 32 as well as through the reeds and a pin segment in the desired width of the drum portion 11, and attached to the start of the cone.

Electronic counters may give the desired length, the desired yarn speed and the desired speed of advance. After switching the machine on, the first wound lap, i.e. the so-called measuring wound lap, is produced by means of the feed device 13.

The number of drum revolutions is preferably measured electronically in the case of the first wound lap and is registered in a counter. In both methods, after finishing of the measuring wound lap, the lease or crossing rods, or the colour lease rods and the overrun rod, are brought manually into the correct position. After the setting of cams 26 and 43 for the lease rods, the starting points of the second wound lap can be set automatically by way of a photo-eiectric cell, so that the actual 105 band width need not be adjusted manually.

The indicated number of the drum revolutions may be given in a second counter from which subsequently the automatic routine can be started. Wound lap upon wound lap can then be warped by sections in automatic sequence.

Between the individual wound laps there is produced, in conformity with the method put into service, a double lease or crossing or a colour division. When the number of bands to be warped by sections is reached, the warping frame is stopped. The last band is severed, whereupon the yarns are fastened to the reed. The feeding device, i.e. the carriage 13, is then returned again to the starting position by means of the driving device. The lease rods are drawn out manually and the spacing cords fastened thereto are cut off Thereafter the lease rods can again be arranged in their starting positions and be connected with the spacing cords. The warping cylinder is drawn off from the shaft after release of the locking means, whereupon an empty warping cylinder can again be pushed on to the shaft and lockgd in position.

After the tying of the band the first wound tap is again produced, the lease rods and cams being adjusted. The change-over to the automatic programme can thereafter take place, so that new windings are once more wound on the drum or cylinder, this taking place in the various sections. The drum or cylinders preferably has a length of about 600 mm. and a diameter of about 400500 mm.

The drum 10 provided with the windings 70 effected in sections may then be supplied for the production of a sample warp, to the beaming machine 3 with a warp beam 71 of customary warp beam length. In doing so the warping cylinders or drums 10 may be pushed on to the shafts 72, 73 and 74 and locked in the take-up devices. The shafts 72, 73, 74 are staggered relative to one another and arranged in juxtaposition, as can be gathered from Fig. 3. With them the warping drums are to be set in such a way that, for example, the last yarn of the fast band of the first drum is situated next to the first yarn of the first band of the adjacent second drum. The same also applies to the other warping drums 10.

The outer layer of each wound lap is then cut through close to the leasing cord of the overrun rod. The individual bands may be taken off on a brush beam 75 by way of a redirecting roller and a clip. The brush beam is directly behind the clip and effects the cohesion of the yarns. When all yarn bands have been taken off, the clip is closed. The warp formed in this way can then be connected with a warp beam manually by way of an expanding reed and a further redirecting roller.

The warp beam is locked in a take-up device which is connected with a driving arrangement (not shown). Two directions of rotation may be selected with the driving arrangement. In the case of the colour-division method substantially the same working operations are used.

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Claims

1. Apparatus for the production of short warps, especially for cloth designs in multicolour weaving, in which the differently-coloured yarns are wound one after another and the yarns pass through yarn-crossing devices on being wound, the winding former being in the form of a drum with a conically-ascending initial portion and the yarn guide for the assembly of yarns to be introduced and lease rods being arranged displaceable along the drum axis, wherein a carriage having a yarn-supply device is equipped for taking up interchangeable carrier sections of which one has a height-adjustable slide bar for keeping the yarns separated and a cam for an overrun rod and is necessary a lease rod and another carrier section is furnished with guide rollers for separate winding if differently coloured yarns, wherein yokes embracing the drum are connected with the carriage and wherein the drum is provided removable from a driving shaft in the direction of its cylindrical end. '

2. Apparatus in accordance with claim 1, A GB 2 058 164 A 5 wherein lease rods are provided over part of the periphery of the drum and the overrun rod at a clearance from the set of lease rods.

3. Apparatus in accordance with claim 1 or 2, wherein the carriage below the drum has a vertical ly-adj ustable striker bar which extends over the range of the set of lease rods.

4. Apparatus in accordance with any one of claims 1 to 3, wherein the yoke comprises a pair of yokes in the case of which the yokes are connected with each other at a predetermined spacing, and wherein the group of yarns can be fed between the yokes of the pair of yokes to the drum.

5. Apparatus in accordance with any one of claims 1 to 4, wherein the carriage for the first carrier section has looping rollers, a measuring roller, tiered lease rods for the coloured yarns, a slide bar for the shedding of the yarns and a leasing reed.

6. Apparatus in accordance with any one of claims 1 to 4, wherein the carriage for the other carrier section has a feed device with a reed, a measuring roller and a looping roller and a guide member for the distribution of the coloured yarn in the axial direction.

7. Apparatus in accordance with any one of claims 1 to 6, wherein the lease rods are provided at their rearward ends with extensions in the form of cords, and wherein the cords have the form of bobbins which are arranged at the supporting device for the drum cone.

8. Apparatus in accordance with any one of claims 1 to 7, wherein a beaming machine for a sectional beam is associated with the warping machine for short warps, the beaming machine being provided with take-up devices for the warping drums, and wherein the shafts for mounting the warping drums are arranged staggered relative to one another in elevation and/or in lateral spacing.

9. Apparatus for the production of short warps, substantially as hereinbefore described with reference to the accompanying drawings.

Printed for Her Majesty's Stationery Office by the Courier Press, Leamington Spa, 1981. Published by the Patent Office, 25 Southampton Buildings, London, WC2A l AY, from which copies maybe obtained.

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